Question

If y is directly proportional to x squared
and y = 3 when x = 2, what is y when x = 8?

Answer 1

Y=48

Explanation:

Y= kx^2

3= k x 2^2

3 = k x 4

÷4

3/4 = k

Y=kx^2

Y= 3/4 x 8^2

Y= 3/4 x 64

Y=48

Hope this helps!